What does the amount of radiation that is absorbed or emitted from a surface depend on?

What are the abilities of microwaves?

- are absorbed by water and fat molecules which causes them to heat up- can penetrate about 1 cm of food- can cause burns when absorbed by body tissue- can travel through glass and plastics- are reflected by shiny metal surfaces

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What are the abilities of Infrared rays?

- used to heat the surface of food in cooking- reflected of shiny surfaces - absorbed by black objects

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What can cause microwave signals to be lost or affected?

- large objects blocking the signal- poor weather - the curvature of the Earth- interference between signals